Machine for operating upon blanks



Feb; '14, 1928.

- J. M. BENJAMIN MACHINE FOR OPERATING UPON BLANKS Filed Aug. 29. 1923Feb. 14, 1928.

J. M. BENJAMIN MACHINE FOR OPERATING UPON BLANKS 3 Sheets-Sheet 2 FiledAug. 29, 1925 m 5 N. i W

3 Sheets-Sheet5 /NVNTOR- %M- 7V7. 5: a

J. M. BENJAMIN MAHINE FOR OPERATING UPON BLANKS Flled Aug. 29, 1923 Feb.14, 1928.

l mented Feb. 14-, 1928.

UNITED STATES Parent orsica.

.JOHN MI. BENJAMIN, @F BEVERLY, Iw'IASSACHUSETTS, ASSIGNOR '10 UNITEDSHOE MACHINERY GGRPOELATIOH, F ?ATERSON, NEW JERSEY, A CGRPGRATIOIT OFNE'W JERSEY.

MACHINE FOE OPERATING UPON BLANKS.

Appficationfiled August 29, v1923. Serial No. 659,978.

The present invention relates to machines for operating upon blanks andherein illustinted as embodied in a machine for skiving box toe blanksfor use in the manufacture of boots and shoes.

A type of skiving machine commonly ein plevcd tor this class of work isprovided with a rotary cylindrical skiving knife against which the workto be skived is fed. Such machines usually comprise, in addition to thecylindrical knife, a driven feed roll which is located partiallv withinthe knife near the upper portion or its cutti. a presser member whichlocated. outside the l-oii'l'e and above the feed roll and which c0-operates with the latter to feed the work, and stationary edge againstwhich the work is hold while it is being fed. The presser member may, asin the case 0'? the presentinachine, take the form of a driven roll,such a construction being used principally tor operating uponcomparatively stiff pieces at work. In using machines of the abovedescribed character for skiving the mars as oi boi: toe blanks-ncounters. or

similar pieces having curved edges, the blank skiving' mechanism to mustbe guided or controlled, manually or otherwise while being fed, so thatit will be turned gradually in its own plane and its curved edge heldagainst the edge gage con tinuously throughout the skiving operation. lthermore, alter the margin at one edge or thcblank has been skived, theblank must be repositioned relatively to the skiving knife in order thatthe blank may be propererly presented and fed to the knife to enable thelatter to skive the margin around the other edge or edges of the blank.lileretotore, this lepOSllilOlllllg oi the blank has been accomplishedmanually.

juicer-ding; to one feature of the present invention, there is provideda machine for operating upon two localities of a blank in which theblank, after one locality has been operated upon, is automaticallyrepositioned and presented a second time to the operating means to causethe second localityftobe operated upon. In the illustrative machine, abe); toe blank attcr having first been fed to sltiving mechanism inposition to have its breastinargin skived is automatically repo'sitioned and presented a second time to'the have its toe margin red. I

in the inanelecture blanks it often sup port or desired thatthe angle ofthe skive or bevel along one edge or the blank be diiierent from that orthe SlZlVG along the other edge or edges. According, therefore, toanother ten- 'tnre ottheinvention, the relative position pointed'outinthe appended'clainis.

llcrerring now to the accompanying draw- Fig. l is' a top plan view of amachine in which the present invent-ion is embodied, certain portions ofthe machine being broken away; i y i r 2 is a fragmentary plan view ofone or the parts whichis broken away in Fig.1;

Fig. 3 is a side elevation al view of the machine i i Fig. i: is adetail view, partially in side elevation and partially in section,showing a port-ion of: the device for seizing andreposi tioning theblanks otter their breast inargins have been sltived: y

5 is a pcrspective'view showing; the greater part ot the machine;

Fig. (3 is a vertical sectional View taken substantially along the line6-6 of Fin. 3; and

Fig. 'i' is a detail sectional view of a portion oi the work supportingtable showing tne edge a? A pusher partially retracted. i

In the drawings, the invention is shown as embodied in a skiving machineof the general type disclosed in Patent llO. 155M383, granted April 22,1919, upon an application riled in the name of A. Latham. The machine ofthe present application, in coinn'ion wvith that of said patent,comprises a rotary cylindrical skiving knife 2 (Fig. 3) a driven teedroll l, and ahollow base 6. A portion at the to ofthe base 6 constitutesa work able 3 across which the work is in onerativo position and the iiifed While being skired. The knife 2 is carried by a main driving shaft10 which is journaled in suitable hearings in the base (5 and the upperportion of the knife projects slightly above the top of the base inposition to engage the Work. The periphery of the feed roll +1 is curvedlongitudinally to co1'- respond to the transverse curvature of the knifeedge and said roll is yieldingly supported in such a manner that it mayyield bodily away from the knife edge and also tilt. about anaxis whichis at right angles to its axis of rotation. The feed roll l is drivenfrom a feed roll drive shaft 12 through suit able gearing and the shaft12 is driven from lhe'niain or knife shaft 10 by means of a belt. Themounting anddriving connectionsof the feed roll 4'. have not been shownin the drawings since they are or may be like those of the patentedmachine. The work held against the feed roll at by means of a pressermember which, in the illustratire machine, is a roll 14, Whereas in thepatented machine av stationary presser foot is employed. ith theexception of the pres-Ger roll 141 the construction and mounting ofwhich will be hereinafter described,

the parts thus far mentioned are or may be similar to ct'n'respondingparts of the machine of the patent herembefore referred to and referenceis made to said patent for the details of construction of said parts.

In accordance with the present invention, the box toe blanks or otherpieces to be operated upon are stacked one above another in a magazine16 with the lowern'iost blank resting upon a portion of the feed table Ssomewhat to the rear and at one side of the co-operatinofeed and presserrolls. The blanks are led edgewise and one by one from the bottom of themagazine 16 by means of a reciprocating feed plate or pusher 18 by meansof which they are successively positioned upon the feed table as shownby full lines at in in Fig. 1. While being thus tr.-i m ferred from themagazine, each blank rides over a yielding edge gage 22 on the feedtablr. As shown in Fig. 7 the edge gage 12 consists of a thin strip ofspring ell-Pl having one end secured at 22-3 to the feed table ti andhaving its opposite end bent down *ardly to form a gaging shoulderQ-l.The edge go strip 22 is arranged so that normally ibis inclinedurnvardly in the di rection of feed of the blanks and the shoulder 2-1operatively positioned in the path of the blanks. its a blank fed overthe pusher, the strip 2:2 is forced downward by the blank, the shoulderportion 2% being depressed into an aperture in the table 8, to permitthe blank to pass thereover Without being lifted above the table. lVhenthe pusher l8has reached the limit of its feeding movement the blank ispositioned as shown at- 2 in Fig. 1, the curved breast edge of the blankbeing in contact with the forward and correspondingly curved face of thepusher, and one corner of the blank is located between the feed andpresser rolls, the latter being then separated by a distance somewhatgreater than the thickness of the blank. The presser roll is thenlowered to engage the blank yieldingly and the preasrr and feed rolls,both of which are continuously driven, cooperate to feed the blank pastthe rotating skiving knife. is the presser roll is lowered, a prcsserfoot 26 is depressed against the upper face of the blank and presses theblank against the feed table while the blank isbeing fed. The iresnerfoot 26 acts as a drag to oppose frictionally the feed of the blank andthe prersscr foot is so located relatively to the bite of the ford andpresscr rolls that. the drag exerted thcrw by causes the curved bruistedge of the blank to hug the forward edge of the pusher 18 as the blankbeing fed. Thus the blank is guided or controlled in such a Way as toinsure that a scarf or bevel of uniform width will be made along andthroughout the length of the breast margin of the blank. After thebreast margin of the blank has been nkhsed, the blank occupies theposition indicated by dotted lines at 528 in Fig. 1. lhe I'JI'CSI-zfllroll ll, together with the pressor foot 26, is then lifted from theblank and the latter is seized by an oscillating gripper device 30 andthereby swung in its own plane sharply about the corner last presentedto the skivlng knife, this mm'en'ient continuing until the blankrepositioned as shown by dotted lines at 32 in Fig. 1, the blank thanbeing presented to the grip of the feed and presser rolls in properposition for the shiting of the margin around the toe. During tl srepositioning of the blank, the pusher i is being retracted intoposition to remove an other blank from the magazine. As soon as thepusher has been witlulrau'n from above the edge gage strip 52:2, thelatter rises by reason of it, sprin tension and the shoulder ill is thuslifted into ponitiou to engage the curved edge around the toe of theblank so as to guide the blank while its too margin is living skii'cd,the gage shoulde 2 Bl; at this time PUP forming a function similar tothat of the curved forward edge of the pusher when the pusher is in itsforward position and the blank is being fed for the skiving of itsbreast margin. The presser roll 1e and the presser foot 26 are thenlowered and the blank is again fed past the skiving knife the presserfoot serving to control the feed of the blank by causing the curved edgeof its toe portion to hug the shoulder :24 of the edge gage so as toinsure the cutting of a bevel of uniform Width around the toe margin ofthe blank. While the presser roll and the presser foot are lifted fromengagement with he lan to ble the lat er t e rehill mistress positionedby the swinging ot the gripper device 30, the presser roll may be tiltedto vary the angle of its axis relatively to the knife edge. and thus tocause the toe margin ot the blank to be bevelet at a diil'erent anglefrom that of the breast margin of the blank. fetter the margin aroundthe toe. of the blank has been skived, the presser roll and the presscrioot or again lifted to tree the hlai' 1 and the prcsser roll is tiltedhack to its on inal angular axial relation to the knife edge preparatoryto operating upon the breast margin of the succeeding blank. By thistime the feed plate 18 and the gripper device 30 have also been restoredto their initial positions, and the machine is ready to start anothercycle of operations.

The magazine 16 for holding; the blanks to be operated upon comprises arear wall 3-1 5 having a horizontal curvature corresponding to that ofthe breast edges of the blanks, and side walls 3% which are disposed at.an angle to the rear wall corresponding to the angles deined by thecorners of the blanks. One oi. the side walls 36 may be formedinteei-ally vith the. rear wall as shown while the other side wall maybe roleasably secured to the rear wall with provision for adjustmentlLOVZllCl. and from its companion side wall, as indicate l at 38.thereby adapting the ni 'azine to hold blanks of ditl'erent sizes. 5 0which ris rom the base 6 and extends thr-mzgg'h a bracket 42 carried bythe magazine. The bracket 4:2 is secured to the post 4.0 at suchelevation that the lower edges of the magazine walls will be spacedabove the feed table 8 sutliciently to permit the t'eedplate 18 toreciprocate between the feed table and the bottom edge. of the magazinewalls and to permit the lowermost. blank in the magazine to be renuivedby the forward stroke ot the feed plate. The bracket 1-13 only beadjuctal'ily secured to the post l0 so that the space between themagazine walls and the .'eed table may be varied. to accommodatedincrcnt thicknesses of blanks.

The magazine is suonortedb a. st l. l

'llhe teed plate or pusher 18 is of the genoral triangular shape shownin Fig. 1 and its Forward edge is curred as sir-own at hi: to conform tothe cmfvature ot the breast edge of the blanks. he thickness of the feedplate is preferably somewhat less than tha ot the blanks to insureagainst the possibility of engaging two blanks at a time in themagazine. The feed plate is movable in a rectilinear oath to teed theblanks into position to be engaged by the teed and presser rolls. Tothis end the feed plate is dovetailed to slide in a guideway l?) (Fig.5) in the teed table 8. The portion of the teed plate which slides inthe guideway 1-5 is extended forwardly oi the curved edge as shown-atdo, to provide support for the hhuiltas it being fed :ronr theinagazinc.

plate is caused to remain at rest in i s tor ward position while thebreast edge of the blank is being skived and during this time its curvedforward edge *trmetions to nni-zle the blank as it is being lied to theknife.

The teed plate 18 is reciprocated by means of a lever one end of whichis 'tulci upon a lined stul (l i jy. rising ilirim the base 6 while theopposite end ot said lever is connected by a short link 5% with the rearof the feed plate. lhe lever 50 swung to actuate the feed plate by meansof a c 'ank pin 56 which is :arricd by a cam disk 58 and is connected tothe lever 50 at apoint intcrmei rod orlink 60. The connccti as betweenthe link 60 and the crank pin 56 am. also bctween said link and thelever 50 are in the form oitball and socket joints which permit the; inkto swing slightly in a horizontal.

' The feet plane as said leveris swung' about its tulcruni. The cam dia:58 fired upon a. horizontal shalt 21 which is journaled in suitablebearings carried by the base 6 and which is driven through a clutch 64-.whereby the cam d is caused to make a halt' a revolution tu ice in eachcycle oii operations as will be hereinatter explained.

The prcss r roll 14-. is rigidly .ecurcd upon a shaft. TO (il ig. whichis iournaled in bearings '72 termed on a carrier let, the inner I endsof the bearings engaging; opposite tau-es ol said roll to prevent axialdis Jlacomcut of the roll and shaft. The presser roll l-lis shaped, bestshown in Fig. 3, so that its? profile subs autially corresponds to thatoi oi the feed roll 4-. The angle of the bevel formed by the skivingknife is varied by tilting the ot the presser roll to brinrg' timed itslongitudinally curved periphery more or less nearlyparallel to thecurved prolile. oi

the teed rol In order that the presser roll l l may be tilted axially asdescribed. th roll carrier'l-:lis provided with segmental ribs it; whichproject outwardly from op osite sides thereot' and received in s c}mental guideways in the opposed sides a bifurcated segmental carriersupport il The. center oil curvature of the ribs 76 and. associatedguidcways is so lo .tiiQtl that whatever the angruh-ir adjustment of thepress-er it I'll roll may hethe thickness of the skived edge.-

and the. shape or ot the blank will not be altered. To enable thepresse' roll to be aised and lowered to release or engage the work.t-hecar'ier support '78 is seen ed to the lower end of a spindle 80which is nounted for vertical sliding; moveu'ient within suitablebearings 82 and 84; supported by a standard 86 rising from the base (3.

T he presser roll is driven continuously from the teed roll drive shaft.ii? throughout the (,iperation oi? the machine. The. connections betweenthe presser roll ll l and the,

shaft 12 comprise two horizontal shafts and 92 and an extensible link9 1. The shafts 90' and 92 are disposed at right angles to each otherand are journaled in suitable hearings on the base 6. he extensible link94 comprises telescoping sections, one of which has a universal jointconnection 96 with the presser roll shaft 70, while the other section ofthe link 9-1 has a universal joint connection 98 with the shaft 92. Theextensible link and universal joint construction just h-scribcd permitsthe presser roll to be raised and lowered and also to be tilted asrequired at different stages of the operation upon each blank. Tlwtelescoping sections of the link Sl t are constrained to rotate inunison by means of a pin and slot connection 100 (Fig. 5) arranged topermit a limited amount of relative longitudinal movement of the linksections. The shaft 92 is driven from the shaft 90 through intermeshingworm gearing 102 while the shaft 90 is driven by a chain 101 whichpass-es over a sprocket wheel 106 on said sh: f, and over a sprocketwheel 108 on the feed roll drive shaft 12.

The frame or support for the presser roll and the presser foot isadapted to be raised and lowered at in't determined times in each cycleof operations of the machine by means of a caui-actiuited lever 110,said lever being fulcrunied upon a rod 112 that is supported at its endsin suitable bearings 114;. One end of the cam lever is pivotallyconnected at 116 to an car 117 rising from the carrier support 78, whilethe opposite end of aid lever carries a cam roll 118 which rides in acam path 120 in the face of the cam disk The cam shaft 62, to which thecam disk is adapted to be connected through the clutch ti l-V, is drivenfrom the shaft 92 through intern'ieshing worm gears 122 and 12 1, thegear 122 being fixed to the shaft 92 while the gear 121 loosel mountedupon the cam shaft 62.

To secure the necessary intermittent rotation of the cam disk 58, thecam shaft 62 is adapted to be connected with the gear 124 b v a clutchof the Horton type as indicated at (J4. This type of clutch is so well.known that it need not be described in detail herein. lt will besufficient to explain that the clutch ti-l: has friction rollers 1215(Fig. 3) adapted rolatably to connect the two clutch elements. of whichthe inner or driven element is fast upon the cam shaft ('32 while theouter or driving eleu'ient is secured to the gear 124. The frictionrollers are normally held out of operation by means comprising acontroller ring; 128, this ring be ng provided, as shown in Fig. 5, witha radially projecting lug which co-operates with one or the other of twoabutment plates 132 carried by a control lever 134. The lever 13 1 ismounted to rock about a fixed horizontal pivot stud 136 and is actuatedby rank pin 138 projecting into a. block 1 10 which is slidable withinthe slotted rear extremity of said lover. The crank pin 138 is carriedby a worm wheel 1-12 which is mounted upon a fixed stud 141 and iscontiiniousl driven by a worm 1% on the shaft 92. The forward end of thelever 131, which carries the clutch controlling abutments 132, is madein the form of a ring to encircle the cam shaft (12 and the abutments132 are supported at diametrically opposite points upon the innerperiphery of this ring. The ahutments .132 are cushioned by suitablesprings 148 which absorb the shock due to the engagement of the lug 1.30with the abutn'icnts. The abutiuents 132 are so arranged at differentdistances from the center of the ringshaped end of the lever 1-3 thatwhen said lever is swung; in one direction to throw one abutment out ofthe path of the lug 130 on the irontroller ring 128, the other abutmentwill be moved into the path 0 said lue'. W'hen the lug; 1-:50 releasedthe friction rollers are spring-pressed into operative positions toconnect the clutch members. Thus when one of the abutnients 132 isdisei'lgagred from the lug 130. the clutch operates to inn part a halfrevolution to the cam shaft (52 and is then arrested by the engagementof the lug 130 with the other abutment.

The cznn path 120 is so designed that the presser roll 14 will be ra sedand lowered at each halfrevolution of the cam disk. During the firsthalf rotation of the cam disk the movements derived therefrom are timedto liftthe presser roll from the blank after the breast margin of theblank has been skived, thus permitting; the gripper device 30 toreposition the blank for the skiving of the toe margin thereof. Beforethe movement of the cam disk is arrested the presser roll lowered intoengagement again with the blank to enable the presser roll to cooperatewith the feed roll 1 in the further feeding of the blank. During thesecond half rotation of the cam disk in each cycle of operations. thecam disk 58 functions to lift the presser roll from the work to free thework after its entire margin has been skived and thereafter to lower thepresser roll into engagement with the next blank to be operated upon.

In order that the prcsser foot 26 shall be raised and loweredsiinultaueously with the raising and lowering of the presser roll 11..the presser foot is carried by the frame or support 73 for the prosserroll carrier. its best shown in Fig. 5, the presscr foot 21' is carriedat the lower end of a 1 cm 150 that is Slidable in a beariiu 152 formedon the carrier support 78. The presser foot is urged downwardly by aspring 15 1 which is coiled around a reduced portion of the stem 150,the spring hearing at its lower end againsta shoulder on the stem and atits upper end against a shoulder within the bearing 152, said springbeing compressed ion lllf) lit) between said shoulders when the presserfoot is in engagement with the work. The stem 150 is reduced at itsupper extremity and projects above the bearing 152 and a collar 156,fixed to the projecting portion of the stem, co-operates with the upperend of the bearing 152 to limit the downward movement of the presserfeet when the latter is raised above the work.

It is usually desirable to skive the breast margin of a box toe blank ata somewhat sharper angle than the margin around the toe therebyproducing a widerscarf at the breast than at the toe. The angle of thescarf is varied by tilting the presser roll a .tially to vary therelation of its profile to the knife edge and thus to vary thetransverse angular relation to the knife edge of. the marginal portionof the blank which is being ted to the knife. The segmental presser rollcarrier Tl is oscillated bodily with respeetto the carrier support 78for the purpose of tilting the axis or the presser roll as hereinbetoreexplained. This oscillatory adjustment of the presser roll carrier Tel;is obtained by the action of a crank'pin 160 (Figs. 5 and 6) whichprojects tl'rom one end of a horizontal. stud shattt 162that isjournaled in the solid upper portion of tl e presser roll carriersupport or frame 78. The crank pin 160 works in a verticallyelongatedslot 16st that is formed in anarin 166 which rigidly secured to thepresser roll carrier. is shown in Fig. 6, the arm 166 is secured to thecarrier Tet by means 01 a screw 168 and is extended outwardly andupwardly from said carrier to avoid inter terence with the carriersupport or tt'ran ie The stud 162 that carries the crank pin 160 at oneend, has fixed to its opposite end a pinion 1'70 and interineshing withsaid pinion is a driving gear 172 which ispivotally mounted upon theside 01' the carrier support 78 and provided with tour plus 11 1 whichproject from its outer face in equally spaced apart relation. Arrangedto engage one of the pins upon each upward movement of the presser rollcarrier support is a pawl 176 which depends from a pivot stud carried bya portion ol the standard 86, the pawl being provided with a. laterallyoll'set weighted portion 178 at'its upper end which functions to holdthe lower extremity of the pawl. in cooperative relation with the pins11. 41 on the gear 172. The arrangement is such that upon the upwardmovement of the presser roll carrier support- 78 the pin 17% nearest thepawl 176 will engage a shoulder 180 on the pawl and the relativen'ioven'ient between said support and said pawl will cause the gear 172to be turned through ninety degrees. The diameterot the gear 172 beingtwice that ol the pinion liOpthe latter will be turned through halt arevolution by the quarter turn o'li the gear 172 and the crank pin 160will be actuated to oscillate the presser roll carrier and thus to tiltthe presser roll to vary its axial angular relation to the knife edge.The changed relation of the presser roll to the knife edge is such thatwhen the presser roll is subsequently depressed into engagement with themargin of the blank, said i'nargin will be presented at a somewhatgreater angle to the cutting edge of the knitte and thus the scarfproduced by the knife will be some-' what narrower and less sharplyinclined.

After the breast margin of the blank has been skived, the blank is swungbodily in its own plane about the corner last acted upon by the knife toreposition the blank with its curved toe edge tangent to the edge gagepreparatory to the skiving of the toe margin of the blank. Thisrepositioning of the blank is ell'ected by means of the grip per device80. This device comprises an arm 184 which extends radially from asleeve 186 which surrounds the upper portion of the spindle 8O otthepresser roll carrier support, said sleeve being interposed between saidspindle and the bearing 82 on the standard 86. The loWer extremity ofthe sleeve 186 rests upon the bearing .84 which is also formed upon thestandard 86 and in which the said spindle 80 isjournaled. Ashereinbefore described, the radial arm 18 1 is formed at its outer endwith a depending portion 188 carrying laterally projecting bearing lugs190 (seel igs. 3 and within which is slid-ably mounted a verticalspindle 192. At its lower end the spindle 192 is provided witlra foot194 carrying a plurality of spurs or prongs 196 which project downwardlyfrom said foot and extend through apertures in a stripper plate 198carried by the depending portion of the gripper arm. Normally the foot194-. is maintained in its elevated position, with the prongs 1.96retracted so that their points are shielded within the apertures 01 thestrip per plate and are thus maintained out of the path of feed of theblank. The foot 194: is held in its elevated position by means of a shoe200 which is located in a recess in the side of the lowermost bearing190 and is trictionally pressed against the spindle 192 by means of ascrew 202 and spring 203. During the skiving ot the breast margin of.the blank the arm 18 1 is positionedas shown in Fi 1, but after thebreast margin has been skived the toot 194 is first depressed to projectthe prongs 196 into. the race of the blank and then the arm 18lisoscillated to swing the blank into the dotted line position designated32 in Fig. 1. The means for depressing the foot 19% to project lltl theprongs 196 into the blank coi'uprises a cam lever 208 which is fulcrumedupon the pivot rod 112 liieside the lever 110. One end of the lever 208carries a cam roll 210 wh ch rides upon the periphery of the cam disk 58and is adapted to be engaged and lifted by a cam projection 5312. Theother end of the lever 208 projects into position to overlie the spindle192 when the arm an is at rest in the position shown in Fig. 1. Uponmovement of the lever 208 by the cam projection 212, the spindle 192 ispushed downwardly in its bearings 190 and the prongs 196 are caused topenetrate the material of the blank.

The rocking of the arm 184; .lior the purpose of repositioningthe blankfor the skiving of the toe margin thereof is effected by means or a gearsegment .316 which is attired upon a vertical rockshatt 218 that ismounted in hearings on the standard 86. The teeth of the gear segmentinterniesh with segmental gear teeth 5220 upon the sleeve 186 of the arm18 1. The rock shaft 218 is actuated by a connecting rod that is pivotedat one end to an arm 2241-. last on the rocksha'lt 218 and at the otherend to the feed plate actuating lever 50 at a point in line with thecorresponding end of the connecting rod 60. As the arm 1& swung aboutthe axis of the spindle 80, the blank, which is impaled by the prongs196, is moved over the surface of the feed table, the blank turningabout its corner 226 as an axis (which corner is then positioned beneaththe presser roll) until the curved edge of the toe margin is broughtinto engagement with the yielding edge gage 92. Just prior to thecompletion of its turning movement over the feed table a laterallyprojecting pin 228 on the spindle 192 is caused to ride over theinclined face of a fixed cam 230 carried by a portion of the standard86, this action raising the spindle 192 and elevating the foot 194 toretract the prongs 196 above the lower face of the stripper plate 198.lhe stripper plate then functions to strip the blank from the prongsleaving the blank tree to be acted upon by the :t'eed roll.

After the blank has been thus positioned for the skiving oi the toemargin thereof, the presser roll and presser 'loot are lowered by theaction of the cam lever 110 during the latter part of the first hallrotation of the cam disk. As soon as the blank is engaged by the presserroll and pressed thereby against the feed roll, the blank is fed againpast the rotating skiving knife, the presser foot also engaging theblank and, by means of the frictional drag exerted thereon causes theblank to turn in its own plane as it is led so that its curved toemargin will be held continuously against the edge gage 22. The clutch(ii is thrown out after the presser roll and presser foot haw beenlowered and the latter are maintained in their lowered or operativepositions until after the toe margin of the blank has been completelyskived. The lever 134 has then been moved into such a position that thecontroller ring 128 is again released and the clutch thrown in to causethe presser roll and presser foot to be raised :l'or the second time inthe cycle for the purpose of releasing the completely skived work. Uponthis second uliiward movement oil the presscr roll the crank pin 166 isactuated to shift the presser roll carrier back to its original angularrelation to its support and thus to position the presser roll to causethe breast margin of the succeeding blank to be skived at the properangle. Inasmuch as the crank pin is turned through 180 at each upwardlllOVGlIlGllb oi the presser roll it will be apparent that when thepresser roll is raised for the second time in each cycle of rniierationsthe crank pin will be returned to the position which it occupied at thestartof the cycle and consemientlr the presser roll will be restored toits initial axial angular relation to the knife edge. This arrangementinsures that the breastv margins oi? all blanks operated upon will havethe same angle of bevel and also that the margins around the toe willall be skived at the same angle.

Although the invention has been set 'lorth as embodied in a machine lorskiving box toe and similar blanks, it should be understood that theinvention is not limited in the scope of its application to theparticular machine which has been. shown and described nor to operationupon any particular kind of blank.

l-liaving described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a machine for skiving blanks, the combination of a skiving knifeand means initially operative to feed the blank and subsequentl; to actas a guide to control the direction oi. travel of the blank past theknit]- to produce a scarf ol uniform width along one edge of the blank.

2. In a machine for skiving blanks. a magazine, a skiving knife, meansto detach a single blank from the magazine, said means being constructedand arranged to form an edge gage, means for feeding a blank past theknife, and means imlepemlcnl oi said feeding means for maintaining oneedge of the blank in contact with the edge gage throughout the feedingmovement.

3. In a machine for skiving blanks, a skiving knife, means to feed theblank past the knife, a presser roll for maintaining the edge margin ofthe blank in operative engagement with the knife during the feedingoperation. means to vary the angular displacement oi the presser rollwith respect to the feeding means to permit the edge nnirgin of theblank to be presented to the kni to at various desired angles, an edgegage, and frictional means to maintain the edge of the blank in luu till

guiding engagement with the gage during the feeding and cuttingoperations.

t. In a machine for bevelling the margin of a blank, a skiving knife,means for effecting relative movement lJGfWGIl the knife and the blankand means operating after a portion of the margin of the blank has beenbeveled to vary the transverse angle of presentation of the blank to theknife to vary the angle of bevel produced at another por tion ofthemargin of the blank.

5. In a machine for operating on blanks, a skivin'g knife, a magazine, afeed member, means for operating the feed member to feed a blank fromthe magazine to a position in proximity to the knife and for holding thefeed member stationary to guide the blank during movement of t 1e blankpast the .mife, means for feeding the blank past the knife, and meansengaging the surface of the blank for frictionallyopposing the feedmovement of the blank past the knife to cause the blank to be heldagainst said feed member while being cut by the knife.

(3. In'a machine for skiving blanks, a skiving knife, means forrelatively moving the blank and knife to skive the margin of the blankprogressively and entirely round the blank, and means to vary thetransverse angle of presentation of the blank to the knife at apredetern'iined point in the relative travel of the knife and the blankto vary the angle of bevel produced by the cutting operation.

7. In a machine for skiving box toe blanks or the like, a rotarycylindrical skiving knife, feed rolls for feeding a blank to the knife,a magazine for holding a stack of blanks, and means for feeding a blankfrom the magazine and delivering it to the feed rolls in such a positionrelatively ,to the knife that the breast margin only of the blank willbe presented to the knife, said'feeding means being constructed andarranged to Serve as aguide for the blank during the cutting operationthereon.

8. In a machine for operating upon blanks, an operating member, feedrollsfor feeding a blank to said member, a magazine for bolding a stackof blanks, a pusher forengaging one edge of the endmost blank in thestack and delivering the blank to the feed rolls in position to have themargin adjacent to said edge fed to said member, said pusher beingadapted to remain stationary while the blank is being thus fed to serveas an edge gage to guide the blank.

9. In a machine for operating upon blanks, an operating member, a feedtable, means for feeding a blank across the table and past said member.an edge gage on said table for guiding the blank as it is fed past saidmember,

said gage being beveled to permit a blank to be fed transversely acrossthe gage and substantially at rightangles to the direction of feed ofthe blank pastsaid member, and

means for feeding the blank transversely across said gage into positionto be guided blank past the knife to skive one edge of the blank, andmeans for swinging the blank about the apex of the angle formed by theedges of the blank after the first edge has been skived to position theblank forv the skiving of the other edge thereof.

12. In a machine for skiving blan haw ing oppositely and unsymmetricallydisposed edges, a skiving knife and automatic means for relativelymoving the knife and the blank to skivejthe margin of the blankprogressively and entirely around the blank.

13. In a machine for skiving blanks having oppositely andunsynnnetrically disposed edges, the combination With a skiving knife,of automatic means for feeding the entire margin of a blankprogressively to the skiving knife to effect the skiving of the marginentirely around the blank.

1%. A machine for operating upon a blank in two localities which extendat an angle to each other having, in combination, mechanism foroperating upon the blank, means for feeding the blank to the operatingmechanism in position to have one locality operated upon, and means forrepositioning the blank relatively to the feeding means after theoperati-ei'i upon one locality has been completed to cause the blank tobe fed a second time to the operating mechanism in position to have theother locality operated upon.

15, In a machine for skiving blanks havin two edges which meet at anangle to each other, a skivingknife, means for feeding and guiding ablank relatively to said knife to cause the blank to be skived along oneof said edges, and means operative after said edge has been skived forvarying the tran verse angular relation of the other edge and theskiving knife to cause the edges to be skived at different angles.

16. A machine for operating upon a blank in two localities thereofhaving, in con'ibinatien, operating mechanism, means for feeding theblank to said mechanism to cause the blank to be operated upon in onelocality, and means becoming operative after the operation upon onelocality has been completed for repositioning the blank with respect tothe feeding means preparatory to a second presentation to the operatingmechanism and for changing the relation between the feeding means andthe operating mechanism.

17. A machine for operating upon a blank in two localities thereothaving, in combination, operating mechanism, means for feed ing theblank to the operating mechanism to cause one locality to be operatedupon in a given n'ianner, a carrier for receiving the blank after it isso operated upon, automatic means operative to cause the carrier to re-'iosition the blank relatively to the feeding means preparatory tocausing the blank to be led a second time with the second localityexposed to the operating DlQGllEtlllSln, and means for changing therelative positions of the feeding means and operating mechanism beforethe blank is so ted.

18. In a machine for operating upon the mar s of blanks having two edgesarranged at an an le to each other, an operating member, rollers forengaging opposite sides of a blank to feed it past said member, meansfor guiding and controlling the blank while it is being fed to causesaid member to operate upon the margin adjacent to one edge of theblank, means for separating said rolls to release the blanklnon'ientarily after said margin has been operated upon, and means tormanipulatingthe blank while released by the feed rolls to position itrelatively to said rolls and operating member for operation upon themargin adjacent to the other edge thereof.

19. In a machine for operating upon the margins of blanks having twoedges arranged at an angle to each other, an operating member, rollersfor engaging opposite sides of a blank to teed it past said member,means for guiding and controlling the blank while it is being fed tocause said member to operate upon the margin adjacent to one edge oilthe blank, means tlorseparating said rolls to release the blankmomentarily after said margin has been operated upon, and means formanipulating the blank while released by the feed rolls to position itrelatively to said rolls and operating memher for operation upon themargin adjacent to the other edge thereof and for again separating saidrolls after both of said m: rgins ha ve been operated upon to enableanother blank to be introduced between them.

90. In a machine for operating upon lJllll lks having two edges arrangedat an angle to earl other, an operating tool, a l'eed table, means forfeeding the blank along said table and guiding it to cause said tool tooperate upon one edge oi the blank, means including prongs adapted topenetrate the material of the blank for shifting the blank upon thetable after said edge has been operated upon and relocating the blankupon the table in position to be ted to said tool for operation upon theother edge thereof, and means for stripping the blank from the prongsafter it has been thus relocated.

21. In a machine for operating upon blanks having two edges arranged atan angle to each other, an operating tool, a feed table, means tor:teeding the blank along said table and guiding it to cause said tool tooperate upon one ei'lge ot the blank, means including an oscillatory armtor repositioning the blank relatirely to said tool for operation uponthe other edge oi the blank, inkongs on said arm For seizing the blank,and means For moving said prongs-i relatively to said arm to seize theblank after one edge has been operated upon and subi'eqneatly to releasethe blank for operation upon the other edge thcreol.

22. In a skiving machine of the type ha\'- ing a rotary cylindricalskiving knil'e, a feed roll. within the knife, and. a pre ser rollwithout: the knife eo-operating with said roll to feed the work past theknife. the combination therewith of means tor autoniaticall v separatingsaid rolls during the operation of the machine to permit the work to berepositioned between them.

23. In a .skiving machine of the type having a rotary ovlindricalskiving' knife, :1 teed roll within the knife, and a prosser rollwithout the knife to-operating with said "teed roll to feed the workpast the knife, the combination therewith for adapting the machine toskive box toe blanks, comprising means for separating said rolls alterthe breast margin ot' a blank has been skii'ed to permit: the blank tobe repositioned relatively to the rolls tor the skiving ol the marginaround the toe.

52 i. In a machine for skiving blanka having two edges which meet in acorner, in combination, a rotary cylindrical i-ili'iring knil'e, a feedroll. within the knit. a preset-r roll without the knil'e co-operatiugwith said teed roll. to feed :1 blank past the kill I'm and means formomentarily lifting the press-er roll out ol contact with the blankafter one o'l its edges has been skirt-d, to pern'iit the blank to berermsitioned between said rolls tor the skiving oi? the other edge ofthe blank.

25. In a machine for skiving blanks haw ing two edges which meet in acorner, in combination. a rotary cylindrical skiving knife, a feed rollyieldingly mounted within the knife, a presser roll without the knifeco-operating with said 'l'eed roll to teed a blank past the knil'e, and.menus tor momentarily lifting the presser roll out oi. contactwith theblank after one o l? its edges has been skived to permit the. blank tobe repositioned liietween said rolls tor the skiring of the other edgeof the blank and for tilting said roll to enable it subsequently to ofmechai'iism llll loll

Ill)

liitl cooperate with the yielding feed roll to vary the transverse angleof presentation of the blank to the skiving knife to vary the angle ofbevel produced by the knife.

26. In a machine for saiving box toe blanks, a skiving knife. means forfeeding and guiding a blank relatively to said kniie to canse the blankto be skived along the breast and toe margins thereof, and means vcafter the breast margin has been ,3 tow-'ary the transverse angle ofpresenaiment of the margin to the knife to cause a narrower scarf to beproduced around the toe than along the breast edge of the blank.

27. In a machine for skiving ho): toe, blanks, in combination, a rotarycylindrical skiving knife, means including a presser roll for feedingand guiding a blank relatively to said knife to cause the blank to beskived along the breast and toe marg gins thereof, and means operativeafter one of said margins has been skiveil to vary the axial angle ofsaid presser roll relatively to the skiving knife to cause the othermargin of the blank to be skived at a different angle from the firstmargin, and means operative after the skiving of one blank has beencompleted to restore the initial axial relation of the presser rollrelatively to the skiving knife preparatory to the skiving of anotherblank.

28. A machine for skiving box toe blanks having, in combination, arotary cylindrical skiving knife, a feed roll within the knife, a

presser roll Without the knife co-operating With said feed roll to feeda blank past the knife, a feed table, an edge gage, a prcsscr foot forco-operating with the feed table to cause the curved edge of the blankto be held in contact with the edge gagc as the blank is fed, and meansfor separating said rolls and lifting said prcsser foot after the171311: has been skived along one of its curved margins to permit theblank to be repositioned relatively to said rolls and the knife for theskiving of the other curved margin of the blank.

29. In a skiving machine of the type having a rotary cylindrial skivingknife, a feed roll Within the knife, and a presser roll Without theknife co-opcrating with said feed roll to feed the work past the knife,the combination tl'icrewith of mechanism for adapting the machine toskive box toe blanks comprising means for swinging the blank in its ownplane to change its angular ously operative mechanism for feeding ablank across the feed table and past the knife, a prcsser foot adaptedto bear upon the face of the blank While the blank is being fed acrossthe table to hold the cm ed margin of the blank against the edge gameans controlled by a normally inoperative clutch for rendering thefeeding mechanism ineffective and for raising the presser foot torelease the blank, mechanism for throwing in the clutch after the breastmargin of the blank has been skivcd, 1 cans operative While the clutchmembers are engaged for repositioning the blank relatively to the knifefor the skiving of the margin around the toe, and means forthrovving outthe clutch after the blank has been repositioned.

31. A machine for operating upon opposite marginal portions of a blankhaving, in.

combination, operating mechanism, means for feeding one marginal portionof the blank along and past the operating mechanism, and meansautomatically to swing the blank in its own plane to reposition theblank for operation by the same-mechani n upon the opposite marginalportion there- 0 i 32. In a machine for operating upon a 'to presentanother side thereof to said operatmg mechanism, and means for feedingthe in turn past the.

blank to advance said sides operating mechanism.

In testimony whereof I have signed my name to this specification.

Joan M. 'BENJ'alrHN.

